311899 has 8 divisors (see below), whose sum is σ = 377568. Its totient is φ = 251520.

The previous prime is 311897. The next prime is 311951. The reversal of 311899 is 998113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311899 - 2¹ = 311897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311899.

It is not an unprimeable number, because it can be changed into a prime (311897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192 + ... + 1429.

It is an arithmetic number, because the mean of its divisors is an integer number (47196).

2³¹¹⁸⁹⁹ is an apocalyptic number.

311899 is a deficient number, since it is larger than the sum of its proper divisors (65669).

311899 is a wasteful number, since it uses less digits than its factorization.

311899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645.

The product of its digits is 1944, while the sum is 31.

The square root of 311899 is about 558.4791849299. The cubic root of 311899 is about 67.8169094303.

The spelling of 311899 in words is "three hundred eleven thousand, eight hundred ninety-nine".